Balanced top roll pressure device for fulling mills



Feb. 7, 1939. J VSIMONYDS E1 AL 2,146,450

BALANCED TOP ROLL PRESSURE DEVICE 'FOR FULLING MILLS Filed Jan; 3, 1958 v Patented Feb. 7, 1939 UNITED STATES PATENT OFFICE BALANCED TOP ROLL PRESSURE DEVICE FOR FULLING MILLS Warren J. Simonds, Orange, and Roswell C. Jefferson, Greenfield, Mass., assignors to Rodney Hunt Machine Company,

Orange, Mass., a

2 Claims.

This invention relates to the application of pressure to the top roll of a fulling mill.

The principal object of this invention is to provide the top roll with a balanced pressure so as to avoid variation in pressure at the two ends of a roll due to the variation in the springs, as well as variation in the tension of the spring rods and also to avoid unequal pressure on the rolls to eliminate unequal pressure on the goods therethrough.

It has always been necessary occasionally to stop the old machine to measure the amount of fulling that took place and, if one piece showed excess fulling, to remove it and continue with the fulling of the other pieces.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawing, in which- Fig. 1 is an end View of a fulling mill with our 7 improved balanced top roll pressure arrangement,

and

Fig. 2 is a front view thereof, as indicated by the arrow 2 in Fig. 1.

In order to avoid the above mentioned difliculties and provide an even pressure on the top roll this invention is applied to a pair of rolls Ill and H, the lower one of which is stationary and the other one of which runs in bearings [3 which are capable of rising and descending in guides M. The bearings on both ends support the shaft, of course, which carries the roll. On the top of each bearing is located a spring I6.

The two springs in each roll are connected with an equalizing lever I1 which extends across the machine. The connection at each end is through a pivoted lever l8, these two levers being exactly alike. They are connected with the equalizing lever by depending links H? and with the springs by a pivot 20. The equalizing lever is supported by the plunger 2! of a pressure device, such as a hydraulic or other jack 22, supported at the center of an iron bar 23.

This lever arrangement maintains identical pressure on both ends of the top roll shaft I5 at all times, whether there is variation due to a weak spring or an excessive amount of goods going through one side in the case of uneven loading.

In this way it is not necessary to make any adjustment to provide absolutely equal spring pressure on each end. There is no variation in pressure due to variation in the springs, or the tension of any spring rods, and reducing the need of stopping the machine to measure the amount of fulling.

These several advantages result in more even fulling and especially avoids delays such as have been mentioned above.

Having thus described our invention and the advantages thereof, we do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what we claim is:

1. In a fulling mill, the combination with a stationary bottom roll, a top roll cooperating therewith and mounted to freely move up and down, of a spring at each end of the top roll, a lever connected with each spring for contracting the spring and exerting pressure, a bar at a distance from said top roll at one side thereof extending from the extreme end of one lever tothe extreme end of the other across the machine, and a single variable pressure device connected with the said bar and its center and ata distance from said top roll for equalizing the pressure on the springs and providing for more uniform fulling.

2. In a fulling mill, the combination with a stationary bottom roll, a vertically movable top roll cooperating therewith, a bearing for each end of the top roll, a spring at each end of the top roll, a lever pivotally connected with each spring for contracting the spring and exerting pressure, a bar extending from one lever to the other across the machine, a link connection between each lever and the bar, and a single means for supporting the said bar at the center of the machine for equalizing the pressure on the springs and providing for uniform fulling.

WARREN J. SIMONDS. ROSWELL C. JEFFERSON. 

